Conformational dynamics and ligand binding in the multi-domain protein PDC109.
PDC109 is a modular multi-domain protein with two fibronectin type II (Fn2) repeats joined by a linker. It plays a major role in bull sperm binding to the oviductal epithelium through its interactions with phosphorylcholines (PhCs), a head group of sperm cell membrane lipids. The crystal structure o...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2010-02-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC2823774?pdf=render |
| _version_ | 1818318752802930688 |
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| author | Hyun Jin Kim Moo Young Choi Hyung J Kim Miguel Llinás |
| author_facet | Hyun Jin Kim Moo Young Choi Hyung J Kim Miguel Llinás |
| author_sort | Hyun Jin Kim |
| collection | DOAJ |
| description | PDC109 is a modular multi-domain protein with two fibronectin type II (Fn2) repeats joined by a linker. It plays a major role in bull sperm binding to the oviductal epithelium through its interactions with phosphorylcholines (PhCs), a head group of sperm cell membrane lipids. The crystal structure of the PDC109-PhC complex shows that each PhC binds to the corresponding Fn2 domain, while the two domains are on the same face of the protein. Long timescale explicit solvent molecular dynamics (MD) simulations of PDC109, in the presence and absence of PhC, suggest that PhC binding strongly correlates with the relative orientation of choline-phospholipid binding sites of the two Fn2 domains; unless the two domains tightly bind PhCs, they tend to change their relative orientation by deforming the flexible linker. The effective PDC109-PhC association constant of 28 M(-1), estimated from their potential of mean force is consistent with the experimental result. Principal component analysis of the long timescale MD simulations was compared to the significantly less expensive normal mode analysis of minimized structures. The comparison indicates that difference between relative domain motions of PDC109 with bound and unbound PhC is captured by the first principal component in the principal component analysis as well as the three lowest normal modes in the normal mode analysis. The present study illustrates the use of detailed MD simulations to clarify the energetics of specific ligand-domain interactions revealed by a static crystallographic model, as well as their influence on relative domain motions in a multi-domain protein. |
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| format | Article |
| id | doaj.art-df7ca18193974a2cb78ca4517aa1c3e4 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-13T09:58:13Z |
| publishDate | 2010-02-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-df7ca18193974a2cb78ca4517aa1c3e42022-12-21T23:51:44ZengPublic Library of Science (PLoS)PLoS ONE1932-62032010-02-0152e918010.1371/journal.pone.0009180Conformational dynamics and ligand binding in the multi-domain protein PDC109.Hyun Jin KimMoo Young ChoiHyung J KimMiguel LlinásPDC109 is a modular multi-domain protein with two fibronectin type II (Fn2) repeats joined by a linker. It plays a major role in bull sperm binding to the oviductal epithelium through its interactions with phosphorylcholines (PhCs), a head group of sperm cell membrane lipids. The crystal structure of the PDC109-PhC complex shows that each PhC binds to the corresponding Fn2 domain, while the two domains are on the same face of the protein. Long timescale explicit solvent molecular dynamics (MD) simulations of PDC109, in the presence and absence of PhC, suggest that PhC binding strongly correlates with the relative orientation of choline-phospholipid binding sites of the two Fn2 domains; unless the two domains tightly bind PhCs, they tend to change their relative orientation by deforming the flexible linker. The effective PDC109-PhC association constant of 28 M(-1), estimated from their potential of mean force is consistent with the experimental result. Principal component analysis of the long timescale MD simulations was compared to the significantly less expensive normal mode analysis of minimized structures. The comparison indicates that difference between relative domain motions of PDC109 with bound and unbound PhC is captured by the first principal component in the principal component analysis as well as the three lowest normal modes in the normal mode analysis. The present study illustrates the use of detailed MD simulations to clarify the energetics of specific ligand-domain interactions revealed by a static crystallographic model, as well as their influence on relative domain motions in a multi-domain protein.http://europepmc.org/articles/PMC2823774?pdf=render |
| spellingShingle | Hyun Jin Kim Moo Young Choi Hyung J Kim Miguel Llinás Conformational dynamics and ligand binding in the multi-domain protein PDC109. PLoS ONE |
| title | Conformational dynamics and ligand binding in the multi-domain protein PDC109. |
| title_full | Conformational dynamics and ligand binding in the multi-domain protein PDC109. |
| title_fullStr | Conformational dynamics and ligand binding in the multi-domain protein PDC109. |
| title_full_unstemmed | Conformational dynamics and ligand binding in the multi-domain protein PDC109. |
| title_short | Conformational dynamics and ligand binding in the multi-domain protein PDC109. |
| title_sort | conformational dynamics and ligand binding in the multi domain protein pdc109 |
| url | http://europepmc.org/articles/PMC2823774?pdf=render |
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